Topic
Effective porosity
About: Effective porosity is a research topic. Over the lifetime, 1199 publications have been published within this topic receiving 26511 citations.
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TL;DR: In this paper, the effective pore radius of Winland (r35) is applied based on mercury injection capillary pressure plots (MICP) to assess the pore volume, connectivity, and conductivity.
27 citations
TL;DR: In this article, the application of Gaussian Process Regression (GPR), a state-of-the-art machine learning algorithm, in estimating permeability of carbonate reservoirs is addressed.
27 citations
TL;DR: In this paper, a 2k factorial statistical experimental design and numerical modeling using FLAC3D has been employed to evaluate the performance of artificial water curtain systems under various conditions including equivalent permeability and effective porosity of Asmari limestone, borehole pressure, Borehole spacing and elevation, groundwater level and operation time of boreholes before the storage operation.
26 citations
TL;DR: In this article, the authors used the mobile-immobile model (MIM) and the traditional convection-dispersion equation (CDE) to analyze the observed breakthrough curves (BTCs) at different distances in a 1,250 cm-long saturated and highly heterogeneous soil column.
Abstract: This study uses the mobile-immobile model (MIM) and the traditional convection-dispersion equation (CDE) to analyze the observed breakthrough curves (BTCs) at different distances in a 1,250-cm-long saturated and highly heterogeneous soil column. It provides a simple method to determine the mobile water fraction independently as the ratio of effective porosity over total porosity of the packed soil materials. The effective porosity is calculated a priori as the ratio of measured flow rate and estimated pore-water velocity. It is found that there is a significant amount of immobile water in the soil column, resulting in the anomalous early breakthrough and tailing behaviors of the measured BTCs. Comparing to the CDE, the measured asymmetric BTCs at various scales can be better described by the MIM, especially their early arrival and long tailing parts. The degree of anomalous transport behavior in this large heterogeneous soil column is reduced with transport scale due to the increased mobile water fraction...
26 citations
TL;DR: In this paper, sulfate distribution in the unsaturated zone during artificial ground-water recharge in a basin near Lubbock, Texas was predicted by using easily derived laboratory data if the flow conditions in the field can be described adequately.
Abstract: Sulfate sorption data determined from laboratory investigations were used to predict movement of sulfate during a field experiment of artificial ground-water recharge in a basin near Lubbock, Texas. Laboratory studies confirmed that sulfate sorption is controlled in the system by surface area, content of iron oxides and hydroxides, and pH. Predicted sulfate distribution in the unsaturated zone was made by assuming constant one-dimensional flow. Where these assumptions were met, predictions were generally good at shallow depths and for short times.
At greater depths and longer times, these assumptions combined with other factors, such as changes in effective porosity, variable mineralogy, changing hydrodynamic dispersion coefficients, and variable infiltration rates contributed to the failure of the predicted values to match the observed data.
It appears that sulfate distribution in the unsaturated zone during artificial recharge can be predicted by using easily derived laboratory data if the flow conditions in the field can be described adequately.
26 citations